Vein function monitor



FIG. 1 is a top, front, right side perspective view of a vein function monitor showing my new design;

FIG. 2 is a bottom, rear, right side perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a rear view thereof;

FIG. 8 is a front view thereof; and,

FIG. 9 is a bottom, rear, right side perspective view thereof, with a sensor member thereof uncoiled.

The bottom surface of the sensor member shown in FIG. 9 is unornamented and not claimed. 

The ornamental design for a vein function monitor, as shown and described. 